Optical brightening agents of oxazolyl derivatives

ABSTRACT

A novel oxazolyl derivative having the general formula:   WHEREIN EACH OF R1 and R2 represents a hydrogen atom, an alkyl, a cycloalkyl, or an aryl group which may be substituted by alkyl or alkoxy groups or halogen atoms, or R1 and R2 may be linked each other to form a cycloalkyl group and may be the same or different; B represents a bivalent group; and X represents an oxazolyl group having the formula (II),   wherein R1 and R2 are the same as identified above, an aryloxazolyl group having the formula (III),   wherein A represents benzene or naphthalene nucleus which may be substituted by alkyl groups or halogen atoms, or when the bivalent group represented by B is   X represents the oxazolyl group having the formula (II), the aryloxazolyl group having the formula (III), or an aryl group having the formula (IV),   OR -NHCOR6 wherein each of R4 and R5 represents hydrogen atom or an alkyl group and R6 represents an alkyl or a phenyl group, which is useful for brightening and whitening an organic polymer material.   wherein R3 represents hydrogen or a halogen atom, a alkoxy, cyano, hydroxycarbonyl, an alkoxycarbonyl, a phenoxycarbonyl,

United States Patent 1191 Matsuo et a1.

[ 1 Oct. 22, 1974 1 1 OPTICAL BRIGHTENING AGENTS OF OXAZOLYL DERIVATIVES [73] Assignee: Sumitomo Chemical Company, Ltd.,

Higashi-ku, Osaka, Japan [22] Filed: Oct. 12, 1970 [21] Appl. No.: 80,187

[30] Foreign Application Priority Data Oct. 21, 1969 Japan 44-83990 Oct. 30, 1969 Japan 44-87461 Oct. 30, 1969 Japan 44-87462 Dec. 27, 1969 Japan ..44-186770 Dec. 27, 1969 Japan 44-1869 Dec. 27, 1969 Japan 44-1870 Dec. 27, 1969 Japan 44-1871 Dec. 27, 1969 Japan 44-1872 [52 us c1. 260/240 CA, 1 17/335 R, 117/335 T,

252/30l.2 W, 252/543, 260/37 NP, 260/41 B, 260/41 C, 260/240 D, 260/240 E, 260/240 J, 260/240 R, 260/240.1, 260/295 R,

260/296 R, 260/307 G, 260/307 R,

[51] Int. Cl. C07d 85/44, C09b 23/100 [58] Field of Search 260/240 CA, 307 R, 296 R Bezuglyi et al., Zhur. Obsch. Khim. vol. 31, pp. 3160 to 3166 (1961).

Heinze et al., Chem. Ber. vol. 103, pp. 1572 to 1573 (1970).

Leggate et al., Molecular Crystals, vol. 4, pp. 357-373 (1968).

Walker et al., J. Heterocyclic Chemistry, vol. 1, pp. 72 to 73 (1964).

Chem. Abstracts, vol. 58, cols. 1995-4996 (abst. of Kleinerman), (1963).

Chem. Abstracts, vol. 58, col. 3998 (abst. of Nagornaya et al.), (1963).

Chemical Abstracts, 7th Collective Index (1962-1966), pp. 16,0718 to 160755 (copyrighted 1970).

Chemical Abstracts, 8th Collective Index (1967-1971), pp. 219998 to 220058 (copyrighted 1973).

Karrer, Organic Chemistry, 2nd English Ed., frontispage and page 901, Elsevier Pub. Co. New York, (1946).

Netherlands Published Application No. 661521 1, Ciba Ltd., pp. 1-9 and 22 cited (May 2, 1967).

Primary Examiner-John D. Randolph Attorney, Agent, or Firm-Stevens, Davis, Miller & Mosher 57 ABSTRACT A novel oxazolyl derivative having the general formula:

wherein each of R, and R represents a hydrogen atom, an alkyl, a cycloalkyl, or an aryl group which may be substituted by alkyl or alkoxy groups or halogen atoms, or R, and R may be linked each other to form a cycloalkyl group and may be the same or different; B represents a bivalent group; and X represents an oxazolyl group having the formula (11),

wherein R and R are the same as; identified above, an aryloxazolyl group having the formula 0 (III) X represents the oxazolyl group having the formula (11), the aryloxazolyl group having the formula (III), or an aryl group having the formula (IV),

United States Patent [1 1 [111 3,843,632

Matsuo et all. [45] Oct. 22, 1974 Wherein R represents hydr ogenor halogen atom, e or -NHCOR wherein each of R and R represents alkoxy, cyano, hydroxycarbonyl, an alkoxycarbonyl, a hydrogen atom or an alkyl group and R represents an phenoxycarbonyl, alkyl or a phenyl group, which is useful for brightening R4 and whitening an organic polymer material.

R5 4 Claims, N0 Drawings OPTICAL BRlGHTENlNG AGENTS F OXAZOLYL t DERIVATIVES W This invention relates to optical brightening agents and to a method for preparing them.

This invention also relates to a method for optically brightening or whitening organic polymer materials.

This invention provides a novel oxazolyl derivative """"'ii;"

wherein R represents hydrogen or a halogen atom, an t alkoxy, cyano, hydroxycarbonyl, an alkoxycarbonyl, a I phenoxycarbonyl,

having the general formula:

5 4/ or NHCOR wherein each of R and R represents il hydrogen atom or an alkyl group and R represents an f alkyl or a phenyl group.

(I) 15, This invention also provides a method for preparing wherein each of RI a represents a y g m the oxazolyl derivative having the formula (I), which an alkyl, a cycloalkyl, or an aryl group which may be 3352's,? reacting an a'ammoketone havmg the substituted by alkyl or alkoxy groups or halogen atoms, h V g 'or R and R may be linked each other to form a cyclo- 7' 3 7 Y n V alkyl group and may be the same or different; B repre- OH-NH: sents a bivalent group; and X represents an oxazolyl group having the formula (ll), *0

. ,.t .i t ,u R: (V)

N I wherein R and R are the same as identified above, 5 with an acid halide having the formula (VI),

0 (II) HalC-BX wherein R, and R are the same as identified above, an 3 (V h th f I III V i aryloxazolyl group e Ormu a wherein B and X are the same as identified above the W Hal means a halogen atom, in the presence of a base, and ring-closing the resulting acid amide having the o\ A formula (VII),

(111 R1 NH wherein A represents benzene or naphthalene nucleus l which may be substituted by alkyl groups or halogen O atoms, or when the bivalent group represented by B is 40 2 (VII) wherein R R B and X are the same as identified above, in the presence of a dehydrating agent.

In addition, the oxazolyl derivative of the formula (I), z in which B is N -CH=CH-, \S fi0H=oH,

X represents the oxazolyl group having the formula (ll), the aryloxazolyl group having the formula (III), or i an aryl group having the formula (IV),

wherein R is the same as identified above, may be prepared by reacting a p-tolyl derivative having the formula (VIII),

(VIII) wherein R, and R are the same as identified above and Y is s M @I ICE,

with an anil derivative having the formula (IX),

R3 (IX) wherein R is the same as identified above, in the presence of a strong base in an aprotic polar solvent.

In the present invention, the alkyl and alkoxy" mean an alkyl and alkoxy having I to 6 carbon atoms.

Examples of the bivalent group represented by B are @IIIQ Q IOI N N N- N The present invention will be explained in detail below.

In the reaction between the a-aminoketone (V) and the acid halide (VI), examples of the base include alkali bicarbonates such as sodium bicarbonate or potassium bicarbonate, alkali carbonates such as sodium carbonate or potassium carbonate, alkali hydroxides such as sodium hydroxide or potassium hydroxide, alkali acetates such as sodium acetate or potassium acetate, pyridine and its methyl derivatives, and trialkylamines such as triethylamine.

Suitable solvents may be used to make the reaction homogeneous. As the solvents, the following materials are useful: ethers such as diethyl ether, tetrahydrofuran, or dioxane, pyridine and its methyl derivatives, aprotic polar solvents such as dimethylfarmamide, dimethylacetamide or dimethylsulfoxide, and inactive organic solvents such as benzene, toluene, monochlorobenzene, chloroform, carbon tetrachloride, or dichloroethane.

The inactive organic solvents or ethers mentioned above are conveniently used when they are moistened or mixed with water. In this case, the a-aminoketones exist in an aqueous layer and the acid halides in an organic one; and the interfacial condensation may occur.

The reaction can be accomplished at a temperature between C and 100C and the time required is 0.5 8 hours.

In the ring-closure, examples of the dehydrating agents usable in the reaction are inorganic acids such as sulfuric acid, hydrochloric acid, phosphoric acid, or tripolyphosphoric acid, phosphor compounds such as phosphor pentaoxide, phosphor pentachloride, or phosphor oxychloride, and sulfur compounds such as thionyl chloride, or sulfuryl chloride.

The reaction can proceed easily at a temperature of 100C or lower, and the time required is 0.5 8 hours.

In the reaction between the p-tolyl derivative (VIII) and the anil derivative (1X), examples of the strong base include alcoholates such as sodium methylate, so dium ethylate, potassium methylate, potassium ethylate, sodium t-butylate, potassium t-butylate or the like, and hydroxides such as sodium hydroxide, potassium hydroxide or the like. Examples of the aprotic polar solvents include dimethylformamide, diethylformamide, dimethylacetamide, hexamethylphosphoric triamide and the like.

A mixture of the p-tolyl derivative VIII and the anil derivative (IX) in the aprotic polar solvent in the presence of the base is heated to a temperature not lower than room temperature, preferably to 100C. Although the reaction time depends on the reaction temperature and the kind and amount of the base, usually the reaction is completed within 5 hours. The amount of the anil derivative (IX) is 1.0 to 1.2 mol per mol of the tolyl derivative (VIII) and the amount of the base is not less than one mol per mol of the tolyl derivative (VIII).

The oxazolyl derivatives (I) thus obtained are insoluble in water and soluble in organic solvents such as odichlorobenzene or dimethylformamide, and show very strong fluorescence under an UV lamp or sun light.

According to this invention, the oxazolyl derivatives of formula I are very useful as optical brightening or whitening agents for organic polymer materials such as cotton, wool, cellulose acetates, polyesters, polyolefins, polystyrenes, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, polyacrylonitrile, polyacrylates, polyamides, polyurethanes, polycarbonates, ABS resins, alkyd resins, phenolic resins, or melamine resins. The organic polymer materials include fibrous materials and plastics. In application of the said derivatives (I) to the fibers or textiles of organic polymer materials mentioned above, they are preferably employed in an aqueous dispersion. More concretely, a said derivative (I) is dispersed in water and the fibers or textiles are immersed into the resulting aqueous dispersion and then the whole is heated. After the treatment (disperse-dyeing" method), the derivative (I) is introduced into the fibers or textile materials, which are now optically brightened.

These derivatives (I) are also fixed onto the fibers or textile materials by the following method (thermosol method):

The fibers of textile materials are dipped in the same aqueous dispersion as in disperse-dyeing method to absorb a certain amount of the said dispersion, and then heated to above C after the pre-drying.

By this procedure, said derivative (1) is thermofixed onto or introduced into the fibers or textiles.

These applications can be efficiently carried out by using additives such as surface-active agents, carriers, auxiliary agents, or the like and by also using oxidizing agents or bleaching agents.

These applications are also effective when combined with other treatments such as resin-finishing or dyeing.

According to this invention, the said derivatives (1) are very stable to heat and therefore can be incorporated into the melted organic polymers, which give, after spinning, the optically brightened fibers. This method is so-called mass-coloration or dopedyeing method.

According to this invention, the said derivatives (1) can be used also for optically brightening or whitening plastics or resins by conventional techniques such as dry-blend, master-batch, or coating methods.

According to this invention, the said derivatives (1) can be added to a pre-polymer, alone or together with other additives, which gives an optically brightend polymer after polymerization or co-polyrrlerization.

As mentioned above, the derivatives (1) of this invention are excellently effective as optical brightening agents for organic polymer materials and an amount of the derivatives (1) used, is very small, for example, when an organic polymer material contains 0.001 0.05 percent by weight of a said compound, it is sufficiently optically brightened or whitened to attain the purposes of this invention.

More useful results may be obtained if they are used in an amount larger than the above.

As stated above, the practice of this invention can be performed at any stages before or after molding.

The present invention will be explained by referring to the following examples, which are, of course, not to limit the scope of the invention. In the following examples, parts and percent are by weight, dimethylformamide is abbreviated to DMF and ethyl alcohol to EtOI-I.

PREPARATION OF THE OXAZOLYL DERIVATIVE (1) EXAMPLE 1 A hot solution containing 30.5 g of stilbene-4,4- dicarboxylic acid chloride and 1200 ml of dioxane was added dropwise to a solution containing 27.2 g of a-methyl-a-aminoacetone hydrochloride prepared according to the method described in Halv. Chim. Acta, 33, 1217 26 (1950), and 600 ml of water while being vigorously stirred. During the addition of said solution,

' Y ield: 77%, m.p.: 218220C (decomposed? a 10 percent aqueous sodium carbonate solution was added also to adjust the pH to 7-8. The mixture was,

thereafter, heated on a bath for one hour, and'was OCH:

was obtained in the state of white crystalline powder.

Elementary analysis N(%) Calculated 70.91 6.45 6.89 24 2u 2 4) Found 70.51 6.30 6.98

40.6 Grams of the stilbene derivative obtained above was dissolved in 300 ml of concentrated sulfuric acid at a temperature of not higher than 30C and the solution was stirred for 2 hours at 30C and poured on 1.21 of ice water. The precipitates deposited were separated by filtration, washed with water until the filtrate became neutral, and dried. Thus, 25.9 g of 4,4-bis(4,5- dimethyioxazol-Z-yl) stilbene having the formula,

was obtained in the state of yellow crystalline powder Yield: 70 percent, m.p.: 266 268C (recrystallized from DMF hereinafter referred to as m.p. 266 268C (DMF) in the following Examples).

Elementary analysis C (70) H N 6) Calculated 77.81 5.99 7.56 24 22 2 2 Found 77.54 6.03 7.55

The DMF solution of the product obtained exhibits blue strong fluorescence.

EXAMPLES 2-36 According to the method similar to that in Example I, the following oxazolyl derivatives were obtained.

R1-C-N\ NCR1 o-on=ono oo-R2 Example number R1 R1 Mrl. C.) Fluorescence in solvent 2 H CH3 197-199 (DMF) Blue (DMF) 3 0113- CH3 21 1-216 (DMF) ..do (DMF) 4 H /CHzCH2 173-175 (aq. DMF) do (DMF) Cg; CII

OH2CH2 5 CHzCHz-CHgCI-Iz 202-204 (DMF) do a. (DMF) 6 11- 219-221 (DMF) do (DMF) 7 0113- Same as above 214-216 (DMF) d0 (DMF) 8 H-- 01 Q 224-228 (DMF) Greenish blue (DMF) 9 H 222-223 (DMF) Blue (DMF) CI-Ia- 10 11 235-236 (DMF) Greenish b1ue (DMF) CHaO 241-242 (DMF) do (DMF) Example number R1 R2 M.P. 0.) Fluorescence in solvent 12 H-- CH3 223-225 (DMF) Blue (DMF) CH3- CIIQ 240-242 (DMF) do. (DMF) 14 H OI-I2CH2 198-200 (EtOI-I) do (DMF) A hot solution containing 27.9 g of biphenyl- 4,4'-dicarboxylic acid chloride and 300 ml of dioxane was added dropwise to a solution containing 30.3 g of 65 Example number R1 R2 M.P. C.) Fluorescence in solvent 1?...1 o1no1n- Ollifilh- 228-236 mom "Blue (DMF) 16 H- Q 254-256 (DMF) Grocnlsh blue..." (DMF) 17 CH a Same as above 249-252 (DMF) 18 CH3 252-254 (DMF) (DMF) CHa 19 H C1 Q 284-285 (DMF) do (DMF) 20 11- 257-258 (DMF) do (DMF) 21 n- 27251 (mm Q55; (DMF) CHaO- 22 f Q 260-262 (DMF) (10 (DMF) Example number R1 R2 M.P. 0.) Fluorescence in solvent 23 H-- CH3- 249-250 (DMF) Blue (DMF) 24 H- /GHz-CH2 225-227 (EtOH) do (DMF) GE: GH- CHg-Cz 25 CH3 CH3 266-268 (DMF) -d0 (DMF) 26 CHaCHz- OHa- 182-185 (DMF) do (DMF) 27 OHzCHz- CHzCHz- 254-256 (aq. DMF) -d0 (DMF) 28 H Q 245-246 (DMF) .do (DMF) 29 CH3 Same as above 240-241 (DMF) .do (DMF) 30 II Cl E 276-277 (DMF) Grcenish blue"... (DMF) 31 11- 248-249 (DMF) Blue (DMF) 32 11- 261-262 (DMF) Greenish blue..." (DMF) CHaO 33 CH;i Same as above 256-257 (DMF) do (DMF) 34 Q Q 29 -292 F) .d

35 279-280 (DMF) do (DMF) CHa- 36 H H- /CI z-CH2 225-227 (EtOH) d0 (DMF) CHg-CHz EXAMPLE 37 addition of said solution,a 10 percent aqueous sodium carbonate solution was added thereto to adjust the pH to 7-8. The mixture was, thereafter, heated for one hour on a bath, and was cooled to deposit precipitates, which were separated by filtration, washed with a 10 percent aqueous sodium carbonate solution, further washed with water until the filtrate became neutral, and dried. Thus, 29.4 g of 4,4-[N-(aacetyl-n-propyl)carbamoyl]biphenyl having the for- 01110111 N N mula, \C/ o H v. v ......V v CH3 .& Q Q c Cl[ Cl[2JC:HNllCO- -oot rut luoincu3 5 0 CH3 COCH:

was obtained in the state of white crystalline powder. was Obtained in the State of light yellow Crystalline Yield: 72 percent, m.p.: 190 192C. powder. Yield: 94 percent, m.p.: l75- 177C (DMF).

Elementary analysis C H (7n) N (70) Elementary analysis Calculated 70.57 6.9] 6.86 C H (r/() N 73 (as C H N O Calculated 77.39 6.50 7.52 Found 7051 6.80 6.98 [5 (as CHHHNZOZ) Found 77.54 6.43 7.55

40.8 Grams of the biphenyl derivative obtained above was dissolved in 300 ml of sulfuric acid at a temm r perature not higher than 30C, and the solution was The DMF Solution of the product obtained exhibits stirred for half an hour at 30C and poured on 4.81 of violet blue strong fluroescence. ice water. The precipitates deposited were separated by filtration, washed with water until the filtrate became EXAMPLES 38-73 neutral, and dried. Thus, 35.0 g of 4,4-bis(4-ethyl-5- According to the method similar to that of Example methyloxazol-Z-yl)biphenyl having the formula, 37, the following oxazolyl derivatives were obtained.

R2 -o OCRg Example number R1 R2 13 Ml. 0.) Fluorescence in solvent 38 11- om- Q 242-243 (EtOH) Violet blue (EtOH) II- 0113- 142-144 (EtOH) do (EtOH) 40 H om- Q 255-257 (DMF) d0 (EtOH) 41 om CH3-- Q 253-254 (DMF) do (EtOH) 42 0113- OH; C 266-268 (DMF) Nude (EtOH) 4s CI-I3- OH3 258-260 (DMF) do (EtOH) 44 C aC I2 CI-Ia Q Q 175-177 (DMF) do (ELOH) 45 CIIaCIIz- CHa Q 162-164 (DMF) d0 (EtOH) 46 CJEQCIIZ GlTiCTiQ- i f i's'i ifiaXEibTiT 'L'QTTEI ITIIQJ (EZOHY 47 l CHz-CE: Same as above 127-120 (EtOH) ...d0 (ELOII) 11' 1 11 331 R1 R2 B M.P. C.) Fluorescence in solvent 48.'.;.;'.;';... n sm'iiis =11) w.,.. ;;.'1 114-115 (ELOII) .violetblueuh uii. (limit 5' 49 Q Q Q 220-222 (DMF) 11 L 50 lI- Sameas above Q 167-169 (aq. DMF) ..d0 LO 51 II- .d0 Q 257-260 (DMF) "110 O H- "mac 227-229 (DMF) mwdonn; tO

53 Cl Q 7 77 (D F) (EtOH) 54 H- Sameasabove A. Q 225227 (DMF) ..do t

55 1-1- ...-a 1 Q 300 (EFF) do (EtOH) 56 II- ..d0 283-284 (DMF) -d0 -3 (EtOH) 57 1 223225 (DMF) d0 (EtOH) 58 H- 170-171 (ELOH) ..d0 (EtOH) H 283-285 (DMF) (10 (EtOH) CHaO- 59 H- Same as above Q 300 (DMF) .do (EtOH) 60 .A I-I (10 300 (DMF) .d0 (EtOH) 61 P Q Q Q -21 MF) -4 62 0113- Same as above Q 162-163 (EtOH) do (EtOH) 63 Q .d0 @Q 287-289 (DMF) Greenish blue (Et H) 272-274 (DMF) d0 (EtOH) l ,3,4-oxadiazole-2,5-dicarbonyl-N a-benzoylmethyl) m(--o ()-U--Rz Example number R1 E2 M1. 0.) Fluorescence in solvent 05-; 1l'- Ulla-'- 248-249 (aq. EtOH) Violet blue (EtOll) 66. GH3- U1lr- 265-266 (aq. EtOll) do (EtOII) 67 H- CH2UH2 198-200 (aq. EtOH) .-do (EtOH) CH2 CH- CH2CH2 68 1[ Q 249-251 (DMF) .-do (E H) e9 H- 01 280-281 (DMgr) Blue (EtOH) 70 H- 300 (DMF) ..do (EtOH) OlIaO- 71 CH;- C 245-246 (DMF) d0 EtPI-I) 72 Q Same as above 300 (DMF) ..d0

73 300 (DMF) .do (Et H) OIIa- EXAMPLE 74 ir According to the method similar to that of Example 1, 34.7 g. of l,3,4-oxadiazole-2,5-dicarboxylic acid dichloride was condensed with 37.6 g of 0 B-aminoacetophenone hydrochloride to give 48.7 g of amide having the following formula, N

Yield: 89.5 percent, m.p.: 266 268C.

Yield: 91.0 percent, m.p.: 300C (DMF).

Elementary analysis Elc nt'r anal sis C H ('70) N ('70) Calculated 75.58 3.96 ll.02

0 N(%) (asc H No) Calculated 70.58 4.44 |0.29 M 4 a 5. (a Cur -moo 7 67 3 98 97 Found 70.77 4.8l l0.57

The DMF solution of the product obtained exhibits 54.5 Grams of l,3,4-oxadiazole-2,S-dicarbonylvery strong glue fluorescence. N-(a-benzoyl-methyl)amide thus obtained was dehydrated as in Example I, to obtain 46.3 g of 2,5-bis[p- 6O EXAMPLES 75408 (S-phenyloxazol-Z-yl)phenyl]-l,3,4-oxadiazole having According to the method similar to that of Example the following formula, 74, the following oxazolyl derivatives were obtained.

El 17 R| -CN\ kirk-(fin /N-CR1 H Rg-CO S -CRz Example number R R; B M.P. 0.) Fluorescence in solvent 75 II- CHa- 137-138 (Aq. EtOH) Violet blue (DMF) 76 11- CH:1 M Q 175-176 (EtOII) Blue (DMF) 77 H CH3 CHa- 154-155 (Aq. EtOH) Violet blue (DMF) 78 H H- 1. CH2-CH2 CH==CH- 128-130 (EtOH) Blue (DMF) CH; CH-

CIIr-CHz 79 11- Q 138-140 (EtOH) .A .do l. (DMF) 80 11- Same as above Q 177-179 (EtOH) Greenish blue.. (DMF) 81 H- 01 Q CH=OH... 184-186 (DMF) (lo (DMF) 82 H- A 1 154-156 (EtOH) Blue ,1 (DMF) 83 CI-Ia Q Q 172-174 (EtOH) Greenishblum" (DMF) 84 Q Same as above 199-200 (DMF) Blue (DMF) 85 Same as above ..d0 Q 237-239 (DMF) s ,l do. (DMF) R1C-N CHCII N-CR1 II II /C13--G /O-BC\ RzC-O O O-CR9 Example No. R1 R; B M.P. 0.) Fluorescence in solvent 86 .2 H CH3- Q 209-211 (EtOH) Blue (EtOI-I) 87 .1 CHr- CHr- Same as above 226-228 (EtOIl) do (ELOH) 88 CH3 CH3 -CH-=CH- 203-204 (EtOH) do (EtOI-I) 89 1I CII1GH2 149-151 (ELOII) d0 (E1011) CH2 /CH CIR-CH; 7

90 II 1. Q Same as above" 211-212 (DMF) Greenish blue." (EtOH) 91 II .s Same as above -CIICII 187-189 (DMF) do (EtOH) 9 01 Q Q 42- 4 (D 10 93 CIla Q Same as above" 215-217 (DMF) undo (EtOH) J4 G Same as above ..d0 s 271-272 (DMF) -..do (EtOH) U5 Same as above .d0 -CH:CH- 248-249 (DMF) l d0 (EtOH) R1C-N\ lfiI- H /NC-R1 H /C BO CBO\ RzC--O O OCR2 Example No. R1 R; 13 Ml. 0.) Fluorescence in solvent 96 H- CHa 265-267 (EIJOH) Violet blue (DMF) 97 CH3- CH3 282-285 (EtOH) "H.110 (DMF) 98 CH3C1I2 CHa- Q 256-257 (DMF) do (DMF) Example No. R, R; 3' MR (1,) Fluorescence in solvent 99 6H3 CH3 6fl6ififff9ikfid T 100 H- /CH2-CH2 Q 202-204 (EtOH) 101 H- Q 277-279 (DMF) .....(10 (DMF) 102 H Sameasabove 300 (DMF) Greenish blue... (DMF) 103 H C1 Q -CH=CH. 300 (DMF) d (DMF) 104 H Same as above Q 300 (DMF) do 105 H-- Same as above" 300 (DMF) do (DMF) CHaO- 106 OH3 Q dO 300 (DMF) d0 107 Q Same as above 300 (DMF) Blue (DMF) CH=CH.. 300 ,(DMF) Greenish blue... (DMF) 108 Same as above.

CHr-

EXAMPKETOQ Y A A mixture of 20.8 g of B-(benzoxazol-Z-yl)-acrylic acid chloride obtained according to the conventional method and 20.8 g of a-amino-p-chloroacetophenone in 200 ml of dimethylformamide was heated to 50 60C on a bath and 45 g of triethylamine was added dropwise thereto while being stirred vigorously. The mixture was, thereafter, kept at 70 80C for 2 hours and allowed to stand. After cooling, the reaction mixture was poured in 500 m1 of water to deposit precipitates, which were separated by filtration, washed with water and dried. Thus, 26.6 g of ,B-(benzoxazol-Z- yl)acry1amide having the formula,

was obtained in the state of light-browri crystalline powder. Yield: 78 percent, m.p.: 215 217C.

Elementary analysis C 70) N (7 Calculated 63.44 3.85 8.22 iu tzi -z u 5 Found 63.21 3.92 8.07

was obtained in the state of yellow crystalline powder Yield: 87 percent, m.p.: 176 177C (ethanol).

Elementary analysis I C H (7%) N ("/v) Calculated 66.98 3.44 8.68 m n z z Found 66.79 3.51 8.71

The ethanol, b'eniene and DMF solutions of the product obtained exhibit blue strong fluorescence.

; EXAMPLES 1 10-221 N\ /N---U--1h /C-CI[=CIIO\ 0 OC-Rz Example No. R; R: A M.P. 0.) Fluorescence in solvent 110 H- CH3- CH 132-134 (Aq. EtOH) Blue violet (E1011) 111 CH OH 142-143 (Aq. EtOH) .dO (EtOH) 112 CHr- CH3 Cl 162-163 (Aq. EtOH) .d0 tOH) 113 CHZOIIr- CJIzCIIz- Sumo as above... 147-148 (Aq.EtOH) ....d0

114 CH CIIz CHzCH 07-100 (Aq. EtOII) .d0 1

115 1-1- 0112-0112 101-103 (Aq. EtOH) -....do (EtOH) CH; /CH- CH -CH;

116 H- 148-150 (EtOH) L-.. d0 1 7 143-145 (ArLEtOH) -nndo (EtOH) 161-163 (EtOH) Greenish b1ue (EtOH) 170-172 (E1011) .do (E1011) 176-177 (E1011) Ellie (E1011) 121 H- Q ame as above-... 146-148 (Aq. EtOH) Blue violet (EtOH) 122 II- 1 A 1 ..d0 159-161 (EtOI-I) Greem'sh blue. (EtOII) CII30' 123 1. (3113- Q ClQ 165-167 (EtOII) Blue .1 (EtOI'I) 124 CIh- U Q Sameasabove.... 168-170 (EtOH) .do (EtOI-I) (EtOH) d0 (EtOH) 168-170 C H; I

' N R -C-N RzC-O Example No. R1 B2 A MR 0.) Fluorescence in solvent 126 H- CHai 189-100 (DMF) Violet blue (EtOH) 127 OH3- CI'Ia- U61 211-213 (DMF) .....do (EtOH) 128 CH3- OH3 196-197 (DMF) ....-d0 (EtOH) 129 H- /CHz-CH2 173-175 (EtOH) do (EtOH) CH2 /CH CHrCI-Iz 130 H 190-191 (DMF) Blue (EtOH) 131 H- (HQ Sameasabove.... 200-202 (DMF) -----d 132 H- 225-227 (DMF) d0 tO I CHaO- Q 188-100 (DMF) .-do (EtOH) 134 f SmnuusuImvu.. 1... I 250-255 (DMF) ""410 (MON) 135 Same as above Same as above. 253-255 (DMF) .d0 (EtOH) CHa- /\ CRz Example Number R1 R; A M.P. 0.) Fluorescence in solvent 130 OH3- CH3 161-163 (DMF) Violet blue (DMF) 137 I'I Cl- CH 174-175 (DMF) Greenish b1ue (DMF) Example No.

138 ..11 Q (I i 190-102 (DMF) Fluorescence in solvent.

B1110 (DMF) 139 Q Same as above San1e1Sab0Ve 197-200 (DMF) Greenishblue. (DMF) 140 CH1- CH 185186 (Aq. DMF) Blue (DMF) I co11=011c A Rg--O0 Emmple 1 R2 A Ml. 0.) Fluorescence in solvent 141 1 II- 0H3- 168-170 (Aq. DMF) Blue MF) 142 CH3 1- CI-1 O 201-202 (DMF) Violet blue (DMF) 143 CH3- CI-h- 122424 (EtOH) d0 (DM 14 II- A 144-147 (EtOH) do 145 II- 169-170 (DMF) Blue ,1 (DMF) :r-CHs 14b I[- 233-235 (DMF) Grcenisllbluen. (DMF) Cl-/ I /N N R1-C R (I; CCH=OH CH=OHC A Example No. R; B2 A Ml. 0.) Fluorescence in solvent 147 11- CH 181-182 (All, DMF) B1110 (DMF) 1 18 CH C1I 01 200-202 (Aq. DMF) (10 (DMF) Example No. 1 R. A P C) Fluorescence in solve fit 1-1.L... v k'l1;v-- .w (Ha-"nu" 105-1117 (Al DMI") .Blue (DMW 150 1I /C]Iz-C1Ig 172-175 (ELOII) 10 (DMF) CH; CH

GHQ-CH2 151 II 200-201 (DMF) Greenishb1ue (DMF) 152 H- Same as above 208-210 (DMF) .do (DMF) 153 H 210-211 (DMF) d0 (DMF) 1 54 OHa- 200-202 (Aq.DMF) .a0 (DMF) CII3 55 Q Sameasabove 190-191 (DMF) d0 .4 (D F) 156 1. Same as above 216-217 (DMF) (10 (D F) CH3- Cl 0 g /C- CH=C1I- -C\ A R2 0 O Exmnple No. R1 R; A Ml. 0) Fluorescence in solvent 157 1I H CHg- Cl 214-216 (DMF) Blue (DMF) 158 CH:1 CH3- 218-220 (Aq.DMF) d0 (DMF) 159 CH3 CH; 208-209 (EtOH) d0 (DMF) 160 1I- O11'gCl1'g 179-181 (EtOH) d0 (DMF) CH: CH

Example No. R R A M (1) Flfiorescence in solvent H- 201-202 (DMF) Urounisfi blue. (DMF) K CH3 162 H- Sameas above 203-205 (DMF) .d0 (DMF) 163 H 232-235 (DMF) do (DMF) Cl -CH;

164 CH3- Q I 211-212 (DMF) -do (DMF) 65 Q Salmons above 242-244 (DMF) ..(10 .1 (DMF) 166 Same as above. 224-225 (DMF) ..do (DMF) W UMWW C a CBC\ A R: O 0

Rx. No. R1 R1 1; A M1. (1.) Fluorescencu in solvent 167.-" Clluf j 1111-193 (DMF) Violet blue (EtOH) 61 Ill; (.HI;-.., "1107 (mull) -1. dorm... (I'JHHI) x j W v 01 169 CH3- CH3 K: 203-204 (DMF) ...-d0 (EtOH) 17o...-11- /CH2-CE2 Q Q 162-165 (EtOH) Blue (EtOH) CH2 CH-- l 171 H- 144-145 (EtQH) .-d0 (EtOH) 192-193 (DMF) .(10 (EtOH) Eixamp l e No. R R A C,) Fluorescefi e in solvem 1482556715111 Elbe Eton 1S6 OH5 208-210 (EtOH) ....d0 (EtOH) 187 Same as above 255-256 (DMF) d0 EtOH) 188 V. Same as above 235-237 (DMF) do EtOH cm CH3 HOH Ill-0 II N R c /C BI f 0/ A Example No. R1 R; B Z A Ml. 0.) Fluorescence in solvent 189 H- 0H;- s 119-120 (EtOI-I) Violet blue (DMF) 190 A. H- OH3 s 01 13e-13s (EtOH) .....do (DMF) 191. on? c113- s 138-139 (Aq. EtOH) .do (DMF) W CH;

192 GH3- c113- s 142-143 (EtOH) .do (DMF) (1113 1. 0113 Q s 163-165 (ELOH) Blue (DMF) 194 ..11 011 4311 s 109410 (Aq.EtOH) Violet blue (D F) CH2 c11- GH2O1I2 1116 ..11- Same nsnbove Q s 160-163 (DMF) Green 1 1I- do Same as above" s 01 158-160 (DMF) 1o 195 H II 133-135 (DMF) Blue (D F) Example No, 1 B Z A M.P. (C Fluorescence in solvent 19s H o cH= n s 130-137 (DMF) Grcenisll Bluew F) 199 H- c1- -CH=CH- 5 Same asabovm. 145-146 (DMF) .-...do

20o H- cmos 01 142-145 (DMF) Blue (D F) 202 H- CHa- O i 01 165-166 (Aq. EtOH) Violet blue (DMF) 203 CHa- CHa- O 168-170 (EtOH) d0 (DMF) 204 CHa- CH3 Q 0 A 192-193 (EtOH) Blue (DMF) 205 II C IzCIIz O OH 87-90 (Aq. EtOH) Violet blue (DMF) 3 CH2 CH CH C6 20b 1. H Q O 181-182 (DMF) Blue (DMF) 207 H Same as above --CH=CH 0 CH 146-147 (EtOH) Greenish blue.-. (DMF) C 173-175 (DMF) ..d0 (DMF) Cl 177-180 (DMF) Blue (DMF) 160-161 (EtOH) Greenlsh blue... Mm

211 Same as above 0 182-185 (DMF) Blue (DMF) 

1. AN OXAZOLYL DERIVATIVE OF THE FORMULA,
 2. An oxazolyl derivative of claim 1, wherein X represents an oxazolyl group having the formula,
 3. A compound of the formula,
 4. A compound of the formula, 